Can a bipartite graph have two non-connected parts?

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A bipartite graph can indeed be disconnected, allowing for two or more non-connected parts. According to the definition, a bipartite graph is represented as $G=(U,V,E)$, where $U$ and $V$ are the two distinct vertex sets and $E$ denotes the edges. If a bipartite graph is not connected, it can have multiple bipartitions, making the $(U,V,E)$ notation essential for clarity in applications. This confirms that disconnected components can still maintain the properties of bipartite graphs.

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For example vertice A connected to vertice B and vertice C connected to vertice D? Would this be considered two different graphs? Here is a graph, would it be bipartite?
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Re: can a bipartite graph have two not connected parts?

A bipartite graph can be disconnected. Wikipedia says: "One often writes $G=(U,V,E)$ to denote a bipartite graph whose partition has the parts $U$ and $V$, with $E$ denoting the edges of the graph. If a bipartite graph is not connected, it may have more than one bipartition; in this case, the $(U,V,E)$ notation is helpful in specifying one particular bipartition that may be of importance in an application".
 

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